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Re: Log(ln) Function + 2 Parameters + Greater


f[a_, x_] := x (a + Log[x])^2;

Plot3D[f[a, x], {x, 0, 5}, {a, 0, 10}]


Bob Hanlon

---- Felipe Mannshardt <vexie.infamous at googlemail.com> wrote: 
> Hello,
> 
> i am having problem telling Mathematica to:
> 
> First Try,
> 
> Clear[x, f]
> f[x_] := x (a + Log[x])^2
> 
> a > 0
> Plot[f[x], {x, -5, 5}]
> 
> Second Try,
> 
> f[x_] := x (a + Log[x])^2
> 
> Plot[f[x], {x, -5, 5}] /.a-> a>0
> 
> 
> What i want is to tell Mathematica to draw a Graph of f[x] when a>0
> 
> Thanks for the help.
> 



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